The battery charger and outlets work, microwave and stove top do not, we don't think there is water in the heater so did not try it yet. The breaker for the microwave is on the backside of the panel, I could find nothing marked stove so "assume" that the microwave and stove are one in the same. That is on the shore power side. On the 12v side there is a breaker labeled "cooler" which is on but the cooler is not working. I did verify that the cooler is functional by plugging it into another 12v outlet.
I had a chance to talk to the PO yesterday afternoon, he verified that they never used either the stove or microwave, have no idea if they ever worked or how to get them working. I suspect you are right that it is a feed issue. They did say they used the cooler a lot so we know that worked last season....something about keeping the Bud Light chilled.
We take possession today, hopefully launch tomorrow. Once in the slip I can pull things apart, connect shore power, etc. Fortunately my dock neighbor is a retired electrician.